Electric Field on the Axis of a Uniformly Charged Disk
The theme of today's class was the binomial theorem; each of the expressions for E were evaluated far away from each charge distribution. The charged disk was seen to behave as a point charge far away. The dipole was found to have an E field which fell off as r-3, rather than r-2 as for the point charge.
The binomial theorem plays a big role in allowing us to check the limiting behavior of expressions that we derive. How big is it?
Last updated Sept. 21, 1997.
Copyright George Watson, Univ. of Delaware, 1997.